diff --git a/docs/facility-layout.drawio b/docs/facility-layout.drawio new file mode 100644 index 0000000..975e9a7 --- /dev/null +++ b/docs/facility-layout.drawio @@ -0,0 +1,155 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/docs/facility-layout.pdf b/docs/facility-layout.pdf new file mode 100644 index 0000000..e9230fe Binary files /dev/null and b/docs/facility-layout.pdf differ diff --git a/docs/facility-layout.png b/docs/facility-layout.png new file mode 100644 index 0000000..ec079db Binary files /dev/null and b/docs/facility-layout.png differ diff --git a/docs/facility-security.md b/docs/facility-security.md index 0bb5a4b..b850290 100644 --- a/docs/facility-security.md +++ b/docs/facility-security.md @@ -67,15 +67,46 @@ option per room. - **Fire detection and alarm** throughout; suppression matched to each zone (hot PVC and hydraulic oil in pressing, chemistry in galvanics, paper and cartons in packaging/finished goods, and the boiler room). + - **Boiler room safety**: the steam generator (10 bar, 180 °C) needs its own - room, safety valves and interlocks, and inspection per Thai boiler - regulations (Department of Industrial Works requirements, licensed boiler - operator). + room, safety valves, fuel shutoff interlocks, and inspection per Thai + boiler regulations (Department of Industrial Works requirements, licensed + boiler operator). - **Emergency equipment in galvanics**: eyewash stations and emergency shower at the plating line, spill kits, and neutralizing agents. - **Emergency lighting, marked exits, assembly point**, and first-aid coverage on every shift. +### Suppression design position: zoned, not full-building gas + +A full-building gas suppression system is ruled out: gas agents only work in +sealed volumes that can hold concentration, which a ventilated production +hall with people and loading doors cannot, and CO2 flooding is lethal in +occupied spaces. The design position is zoned suppression: + +- **Clean agent gas** (FK-5-1-12, sold as Novec 1230, or inert gas such as + IG-541) only in small, sealed, high-value rooms: the server/IT room, + electrical switchrooms, PLC/control cabinets (in-cabinet micro systems), + and above all the master/stamper archive, where sprinkler water would + destroy lacquers and paper records and corrode the metal parts even in a + minor event. +- **Water** (sprinklers, or water mist where equipment matters) for the + large spaces: production, warehouse, and packaging/finished goods, where + paper cartons are the largest fire load in the building. The press hall's + specific risk is a hydraulic oil spray fire (200 L at 180 bar); water + mist handles oil fires well and is gentler on machines than deluge. +- **Battery stack (BESS)**: gas does not stop lithium thermal runaway. Per + NFPA 855 practice the stack needs off-gas and early-smoke detection, + electrical isolation on alarm, physical separation from production + (ideally its own enclosure), and deflagration venting. Detection and + containment over suppression. +- **Galvanics**: low fire load (aqueous baths); local clean-agent + protection for rectifier cabinets is sufficient. + +The property insurer will drive much of the final specification, so involve +them before the design is fixed. The archive gas system and the BESS +detection affect room layout and belong in the site design brief early. + ## Plant systems and monitoring - **Utility monitoring and interlocks**: fume-extraction interlocks on the